Bug, Missing https: in Google Fonts link

Line 85 of inc/customizer/customizer-library/extensions/fonts.php

$request = '//fonts.googleapis.com/css?family=' . implode( '|', $family );

Needs to be

$request = 'https://fonts.googleapis.com/css?family=' . implode( '|', $family );

Unless somewhere else is supposed to prepend the https: to it. As written it was producing

<link rel='stylesheet' id='teletype-customize-fonts-css'  href='//fonts.googleapis.com/css?family=Special+Elite%3Aregular|Contrail+One%3Aregular%26subset%3Dlatin%2C' type='text/css' media='all' />